Semiautomatic telegraphic sending machine



I Feb.1-3,' 192s. 1,445,226

H. G. MARTIN SEMIAUTOMATIC TELEGRAPHIC SENDING MACHINE Filed Dec. 10, 1921 Patented F eb. 1923,

Units .sra'ras arana. OFFICE.

HORACE G. MARTIN, or BROOKLYN, .INEW YORK.

SEMIAUTOMATIG TIELIEGIR /A'PHIC SENDING MACHIN5E.

Application filed December 10, 1921. Serial No. 521,363.

To all whom it may concern:

Be it known that; I, HoRAoE G. M' ARTIN, a citizen of the United States, residing at 'No. 975 East Ninth Street, borough of 1 Brooklyn, city and State of New York, have invented new and useful Improvements 111 semiautomatic Telegraphic Sending Machines, of which the following is a specification.

My invention relates to improvements in semiautomatic telegraphic sending machines,

and more particularly to a simplified construction of the operating 'or handle lever and its combination with the main or vibraticable from the corresponding parts of said Patent No. 842,154, a. metal base 1 (which may rest upon, rubber feet) has a frame 3 secured to its upper side. A main lever 4 has a. shaft or spindle 6 thrust through a hole therein, said shaft or spindle being journaled in screws 7 and 8 in frame 3 (Fig. 4). Screws\9 and 10 insarms 11 and 12 of frame 3 regulate the throw of main lever 4 andits connected parts. Spring 13 whose tension may be'regulated by screw 14 holds lever 4 normally against stop 9.

A vibrator spring 15 has one end secured in main lever 4 and carries on its other end a vibrator bar 16. A-metal ring'17 slides on bar 16 and has a locking screw 18, and it has secured thereto a U-shaped contact spring 19 adapted to cooperate with a contact screw 20 in a post 21 which is secured to but insulated from base 1. Weights 33 and 34 are carried on bar 16 and may be held by their respective screws at any point thereon. Posts, 22 and 23 are for connecting the apparatus in ,circuit. Switch parts 27 to 30, inclusive, and parts 33 to 39, inclusive,

serve the same purposes as those similarly no.part of. my present invention.

Operating or handle lever 40 is made of one piece and has ears or lugs 40? and 40.

bent at right angles thereto with holes there- 'in, so that it may form a U-shapedyoke about lever 4 and be hung and moved upon shaft orspindle 6. In-putting the parts together lever 40 is put in place with lugs 40 and40 above and below lever 4, and shaft 6. 15 then forced through the holes in said lugs and lever 4, fitting the former holes loosely and the latter very tightly so as to prevent lever 4 from .slipping down ,on shaft 6. Spring 41 on'bolt 42 and having its tension regulated by nut 43 holds lever 40 normally against lever 4. Lever 40 may have insulated thumb and finger pieces 31 and :32

thereon, and it also carries an electrical contact 45 adapted to cooperate with a movable contact 44 in post 26. e

It is understood that line post 22'is in electrical contact with base 1 and through the parts connected therewith with contacts 19 and 45; and that line post 23 and pests numbered in said Patent 842,154, and forms i 21 and 26 with contacts 20 and 44 are all in electrical'connection with one another, and while secured to base 1, are insulated therefrom, all as in the manner set forth in said Patent 842,154.

In operation for sending a message the operator moves handle lever40-31 andithe right hand end of lever 4 to the right (away from observer) on shaft 6, compressing spring 13, until the opposite end of lever 4 strikes stop 10. This sets vibrator bar 16 and connected parts in vibration and causes a-s'eries of makes and breaks of the circult between 19- and 20 for sending dots of a.

message, the number of which is determined by the length of time the operator holds the parts in that position. Letting go of the *hand'le 40 permits spring 13 to return the parts to their'normal posit-ions. To send the dashes of a message, the operator moves handle 40 31 'to the left bringing contacts 44'45 together. In this movement lever 40 turns or rotates on shaft6 which fits the holes in lugs 40" and 40 loosely. Afteraeach dash spring 41 returns lever 40 to normal position.

I claim: I

In a semiautomatictelegraphic sending -machine, the combination of a main lever for operating a vibrator bar and a contact,

5 a handle lever having ears or lugs bent into a U-shaped yoke about said main lever and a spindle inserted loosely through holes in said lugs" and rigidly through said main lever and having its ends journaled in bearings, whereby said handle lever may or may not cause the operation of said main lever and vibrator bar according as it is direction or the other.

HORACE G. MARTIN.

moved in one 

